Vocabulary Cards C1
380 cards available.
C1 verb
intrude
Meaning
To enter a place or situation where one is not wanted or not invited.
Example
He felt embarrassed to intrude on their private conversation.
C1 noun
intrusion
Meaning
Unauthorized entry into a system or place without permission
Example
The company detected an intrusion in its server.
C1 noun
intuition
Meaning
The ability to understand something immediately, without the need for conscious reasoning.
Example
Her intuition told her something was wrong.
C1 adjective
intuitive
Meaning
Based on instinctive understanding rather than reasoning.
Example
The software has an intuitive design that makes it easy to use.
C1 adjective, noun
invalid
Meaning
Not valid; having no force or effect. Also refers to a person too weak or ill to care for themselves.
Example
The court declared the contract invalid.
C1 verb
invalidate
Meaning
To make something not valid or legally acceptable.
Example
The new evidence may invalidate the previous ruling.
C1 adjective
invaluable
Meaning
Extremely useful or indispensable.
Example
Her advice proved invaluable to my success.
C1 adjective
Invariable
Meaning
never changing; constant; always the same
Example
His invariable routine includes morning exercise and coffee.
C1 adjective
invasive
Meaning
Tending to spread harmfully, intruding aggressively, or encroaching beyond proper boundaries.
Example
The doctor explained that the procedure was minimally invasive.
C1 adjective
inventive
Meaning
Having the ability to create or design new things or to think originally.
Example
The inventor was known for his inventive solutions to everyday problems.
C1 adjective
Inverse
Meaning
opposite in order, nature, or effect; reversed
Example
There is an inverse relationship between price and demand.
C1 adverb
Inversely
Meaning
in a way that is opposite or contrary; in reverse order or manner
Example
The price of goods is inversely related to their availability in the market.
C1 noun
inversion
Meaning
A reversal of the normal order, position, or relationship.
Example
In poetry, inversion is often used to create emphasis.
C1 verb
invert
Meaning
To turn something upside down or in the opposite position, order, or direction.
Example
He inverted the glass to let the water drain out.
C1 verb
invigorate
Meaning
To give strength or energy to someone or something.
Example
A morning walk can invigorate both body and mind.
C1 adjective
invincible
Meaning
too powerful to be defeated or overcome
Example
The team seemed invincible after winning ten matches in a row.
C1 verb
invoke
Meaning
to call upon a higher power, authority, or principle for help, support, or justification
Example
The lawyer invoked the constitution to defend his client.
C1 adjective
involuntary
Meaning
done without will or conscious control
Example
He gave an involuntary shiver when he heard the loud noise.
C1 adverb
inwardly
Meaning
In the mind or spirit; not outwardly visible.
Example
She smiled outwardly but inwardly she was worried.
C1 adjective
irate
Meaning
Extremely angry.
Example
The customer became irate after waiting for hours.
C1 adjective
irksome
Meaning
annoying or irritating
Example
Waiting in a long line is one of the most irksome tasks.
C1 adjective
ironclad
Meaning
impossible to change, break, or dispute; very strong and firm
Example
The company had an ironclad contract with its suppliers.
C1 adjective
irrational
Meaning
not logical or reasonable; lacking clear thought
Example
His fear of the dark was completely irrational.
C1 noun
irrationality
Meaning
The quality of being illogical or unreasonable; lack of rational thought.
Example
His decision was driven by complete irrationality.